Surface dressing devices



March 8, 1966 J. D. CHRISTIAN summon DRESSING DEVICES 4 SheetsSheet 1 Filed Aug. 10, 1964 M W W M C d 0 W w w mm mm NW. & J WEEZI M IEEE? 2 u T 8Q N H l.l 3 1 \|\W// 5 mam 9 9 L I. .1. ii. .I. @5223 m w T K a mm mm mv Om March 8, 1966 J. D. CHRISTIAN SURFACE DRESSING DEVICES 4 Sheets-Sheet 2 Filed Aug. 10, 1964 m0 mm Wm 5 mm 5 (5, qymf/oah w March 8, 1966 J. D. CHRISTIAN 5 SURFACE DRESSING DEVICES Filed Aug. 10, 1964 4 Sheets-Sheet 5 March 8, 1966 J. D. CHRISTIAN 3,238,550

SURFACE DRESSING DEVICES 7 Filed Aug. 10, 1964 4 Sheets-Sheet 4 Arr-x United States Patent 3,238,550 SURFACE DRESSING DEVICES Joseph Dennis Christian, San Francisco, Calif., assignor to Holo-Flite International Incorporated, San Francisco, Calif.

Filed Aug. 10, 1964, Ser. No. 388,389 6 Claims. (Cl. 15--21) This invention relates to rotary surface dressing devices such as b'rushes, bristles or abrading wheels, used for dressing, e.g. scratching, cleaning or scrubbing the surfaces of articles to be treated.

A particular application of the invention is for scratch brushes. Scratch brushes may be used for various purposes and a particular use is to remove scale particles which adhere to work rolls of rolling mills when aluminium plate is being rolled between them.

When an aluminium strip passes between Work rolls scale particles adhere to the work rolls, and are removed by brushes and pressure jets so that work rolls continuously present clean work faces to the strip.

As the work rolls contact the sheet, large quantities of scale adhere to the faces of these work rolls, which scale must be continuously removed to prevent embedding into or scarring of the aluminum strip. This is accomplished by scratch brushes and jet streams of soluble oil and water.

A useful improvement in eifectiveness can be achieved if the scratch brush can be reciprocated in the axial direc tion while it is rotating. The provision of means for reciprocating a scratch brush can however be complicated, expensive and occupy a great deal of space.

The main object of the present invention is to provide means for oscillating a scratch brush or similar rotary surface dressing device which will be space-saving, comparatively simple and durable.

A further object of the invention is to provide for effective cooling of both reciprocating means and the device as a whole.

According to the invention a surface dressing device comprises a drum for supporting surface dressing means, a fixed shaft projecting from one end of the drum and extending into the drum, means for rotating the drum and reciprocating drive means located within the drum and connecting the drum with the fixed shaft, whereby rotation of the drum causes reciprocation of the drum with respect of the fixed shaft in the direction axially of the drum.

A constructional form of the invention will now be described by way of example with reference to the accompanying diagrammatic drawings wherein:

FIGURE 1 is a sectional view of a scratch brush made in accordance with the invention;

FIGURE 2 is an enlarged view of part of FIGURE 1 showing details of construction;

FIGURE 3 is a section on line IIIIII on FIGURE 2; and

FIGURE 4 is a section on line IV-IV on FIGURE 2.

A mandrel or drum is mounted for rotation on bearings 11, 12 carried respectively by a non-rotating sleeve 13 at one end and a non-rotating sleeve 14 at the other end. The sleeves 13, 14 are slidably mounted on non-rotary shafts 15, 16 by means of slide bearings. The slide bearings of sleeve 13 are shown at 17, 18, FIGURE 2. The sleeves 13, 14 and shafts 15, 16 extend both into and out of the ends of the drum. Oil seals 20, 21 are provided for bearing 11 and similar oil seals for bearing 12. Shafts 15, 16 are fixed at 19A, 19B to any suitable fixed frame or anchorage.

A brush strip 23 is wound helically on the drum and fixed by collars 24, 25.

For rotating the drum, there is an electric motor 26 ice within one end of the drum carried by sleeve 14. The motor drives the drum through a reduction gearing 28 and a pulley-like block 29.

In the other end of the drum, the reciprocating drive means are provided.

A sleeve 30 is pressed into thedrum 10 and into this sleeve are pressed two end blocks 31-, 32. The block 32 is connected to a sleeve 36 coaxial with the drum and pinion teeth 37 are cut on this sleeve. Pinion 37 drives a pinion 38 on spindle 39 offset from the drum axis and carried by a housing 40 which is carried by the sleeve 13. The spindle 39 carries a worm 42 which drives a worm-wheel 43 mounted in the housing 40. The worm-wheel carries a crank or eccentric pin 45 which carries a roll 46 engaged in a follower 47 that engages on either side of the roll. The follower 47 is fixed on the shaft 15.

Rotation of the drum 10 carries with it the block 32 and sleeve 36 which thus drives the worm 42 through the pinion 38. The worm drives the worm-wheel and since the shaft 15 and follower 47 are fixed the crank pin causes the worm-wheel, worm and all parts attached thereto including the drum 10 together with the motor 26 to reciprocate axially of the drum.

An internally toothed ring gear 53 connected to the sleeve 36 and the block 32 transmits power through planet gears 51 which are supported on pinion spindles 51A by bearings 52, to a pinion 54 which is supported at one end by hearing 54A. The bearings 52 and 54A are fixed to a hollow spindle 30A carried by the housing 40. The pinion 54 is formed on a fan shaft 55 surrounded by an oil seal 60. A fan 63 is mounted on the shaft 55 and secured thereon by means of a nut 64 and washer 65.

As ring gear 53 and block 32 rotate with the drum 10 the planet gears 51 are driven which in turn drive the pinion 54 on the shaft 55. The fan 63 therefore rotates on bearing 66 and drives cooling fluid, e.g. air, through the ports 70 and along the passage 71 surrounding the housing 40. The block 31 is connected to the sleeve 30 by a plurality of supports or ribs 20' which are preferably set at an angle of 45 so that as they rotate they act as a fan moving at the speed of rotation of the mandrel. The supports 20 help to pump air towards or away from the fan 63 according to the direction of rotation of the mandrel.

I claim:

1. A surface dressing device comprising a drum for supporting surface dressing means, a fixed shaft projecting from one end of the drum and extending into the drum, means for rotating the drum and reciprocatory drive means located within the drum and connecting the drum with the fixed shaft, whereby rotation of the drum causes reciprocation of the drum with respect to the fixed shaft in the direction axially of the drum.

2. A surface dressing device comprising a drum for supporting surface dressing means, a fixed shaft projecting from one end of the drum and extending into the drum, a non-rotating sleeve surrounding the fixed shaft and extending into and out of the drum, first bearing means between the drum and the non-rotating sleeve permitting the drum to rotate on the sleeve, second bearing means between the sleeve and the fixed shaft permitting the sleeve to reciprocate on the fixed shaft, a housing within the drum fixed to the sleeve, a rotary drive member carried by the drum, and reciprocatory drive means within the drum connecting the rotary drive member to the housing whereby the drum as it rotates also reciprocates along its axis with respect to the fixed shaft.

3. A surface dressing device as claimed in claim 2 wherein the reciprocatory drive means comprises a worm driven by the rotary drive member, a worm-wheel driven by the worm, an eccentric pin carried by the wormwheel, and a follower carried by the fixed shaft and embracing the eccentric pin.

4. A surface dressing device as claimed in claim 2 having a second sleeve which is mounted in the drum and surrounds said housing and carries said drive member for driving the reciprocatory drive means, and said second sleeve is provided with ribs set at such an angle as to act as a fan thereby propelling cooling fluid through the second sleeve and through the drum.

5. A surface dressing device as claimed in claim 2 having a spindle carried by the housing on an axis offset to the drum, at least one. planet pinion carried by the spindle, an internally toothed ring gear carried by the drive member and meshing with the planet pinion, a fan, shaft carrying the fan, and a pinion on the fan shaft meshing with the planet pinion.

References Cited by the Examiner UNITED STATES PATENTS 3/1925 Davis 15 21x 4/1965 Christian 12-21 CHARLES A. WILLMUTH, Primary Examiner.

EDWARD L. ROBERTS, Assistant Examiner. 

1. A SURFACE DRESSING DEVICE COMPRISING A DRUM FOR SUPPORTING SURFACE DRESSING MEANS, A FIXED SHAFT PROJECTING FROM ONE END OF THE DRUM AND EXTENDING INTO THE DRUM, MEANS FOR ROTATING THE DRUM AND RECIPROCATORY DRIVE MEANS LOCATED WITHIN THE DRUM AND CONNECTING THE DRUM WITH THE FIXED SHAFT, WHEREBY ROTATION OF THE DRUM CAUSES RECIPROCATION OF THE DRUM WITH RESPECT TO THE FIXED SHAFT IN THE DIRECTION AXIALLY OF THE DRUM. 